CN109283382A - A kind of circuit of the redundancy feature containing self-test - Google Patents
A kind of circuit of the redundancy feature containing self-test Download PDFInfo
- Publication number
- CN109283382A CN109283382A CN201811151075.4A CN201811151075A CN109283382A CN 109283382 A CN109283382 A CN 109283382A CN 201811151075 A CN201811151075 A CN 201811151075A CN 109283382 A CN109283382 A CN 109283382A
- Authority
- CN
- China
- Prior art keywords
- circuit
- level
- sensor
- resistance
- comparator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of circuits of redundancy feature containing self-test, including sensor circuit, comparator circuit, single-chip microcontroller and warning circuit, the sensor circuit is sequentially connected comparator circuit, single chip circuit and warning circuit, this circuit is worked using two-way current sensor, when normal work, every road undertakes the output of half, low in energy consumption, and the reliability of product increases；When two-way current sensor, which has, to break down all the way, another way can continue to guarantee the normal operation of equipment；And once have sensor failure all the way, it is sounded an alarm by single-chip microcontroller, in time more emat sensor.
Description
Technical field
The present invention relates to a kind of circuits of redundancy feature containing self-test, belong to intelligent measurement field.
Background technique
Used current sensor is once impaired in use currently on the market, it will leads to equipment fault, gives
Client brings huge trouble, in some instances it may even be possible to cause serious hazard analysis and HACCP to society, especially not allow sensor degradation
Equipment in such as subway, high-speed rail, and in the equipment that unattended hell is run it is military, civilian as used in mountain area
Equipment etc., sensor have endless trouble once damaging.So being badly in need of that traditional current sensor circuit is redesigned and added
Upper warning function, so that the product of damage is timely replaced.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of circuits of redundancy feature containing self-test.
In order to achieve the above object, the invention adopts the following technical scheme: a kind of circuit of redundancy feature containing self-test, special
Sign is: including sensor circuit, comparator circuit, single-chip microcontroller and warning circuit, the sensor circuit, which is sequentially connected, to be compared
Device circuit, single chip circuit and warning circuit；
The sensor circuit includes first sensor circuit and second sensor circuit, the first sensor circuit and second
The structure of sensor circuit and principle are all the same；
The comparator circuit includes first comparator circuit and the second comparator circuit, the first comparator circuit and second
The structure of comparator circuit and principle are all the same；
The first sensor circuit includes level V3 output branch and level V5 output branch, and level V3 exports the level of branch
It is level V5 for level V3, level the V5 level for exporting branch, second current sensor circuit includes level V4 output branch
Road and level V6 export branch, and the level that level V4 exports branch is level V4, and the level that level V6 exports branch is level V6；
Level V3 is exported branch and level V5 output branch respectively compared with first comparator circuit and second by first sensor circuit
Device circuit connection, second sensor circuit by level V4 export branch and level V6 output branch respectively with first comparator circuit
It is connected with the second comparator circuit, the value of the first comparator circuit comparative level V3 and level V4 simultaneously connect level V7 output
Branch, the level that V7 exports branch is level V7, value and the connection of the second comparator circuit comparative level V5 and level V6
Level V8 exports branch, and the level that level V8 exports branch is level V8；
The first comparator circuit and the input port connection different from single-chip microcontroller of the second comparator circuit, single-chip microcontroller are more electric
The value of flat V7 and level V8 simultaneously analyse whether exception, and when for abnormal results, single-chip microcontroller gives warning circuit transmission of control signals, report
Alert circuit executes actuation of an alarm.
Preferably, the first sensor circuit and second sensor circuit include sensor sensing circuit, power
Amplifying circuit, secondary coil, inductor comparison circuit and offset regulating circuit, the sensor sensing circuit are successively put with power
Big circuit is connected with secondary coil, and capacitor and resistance composition depth are also connected between sensor sensing circuit and secondary coil
Negative-feedback circuit；
The sensor sensing circuit selects Hall element to carry out electromagnetic induction；The secondary coil connects inductor simultaneously and compares
Circuit and offset regulating circuit；
The secondary coil of the first sensor circuit and the electricity for connecting inductor comparison circuit and offset regulating circuit connecting pin
Put down as level V1, the secondary coil of the second sensor circuit with connect inductor comparison circuit and offset regulating circuit connects
The level at end is level V2；
The level of the output end of the inductor comparison circuit of the first sensor circuit is level V3, the offset regulating circuit
The level of output end be level V5, the level of the output end of the inductor comparison circuit of the second sensor circuit is level
V4, the level of the output end of the offset regulating circuit are level V6.
Preferably, being additionally provided with oscillating circuit and power supply source circuit on the single-chip microcontroller, the oscillating circuit is single-chip microcontroller
Oscillation frequency is provided, the power supply source circuit provides stabilized power supply for single-chip microcontroller, and the single-chip microcontroller selects the single-chip microcontroller of 80 series,
The power supply source circuit selects 1117-3.3V device to be powered.
Preferably, the warning circuit includes wireless WIFI chip and antenna, pass through wireless WIFI chip and antenna
Alarm signal is transmitted to master control room, to be supported in time.
Preferably, the first sensor circuit includes sensor sensing circuit, power amplification circuit, secondary coil
L1, inductor comparison circuit and offset regulating circuit, the sensor sensing circuit include power supply filter capacitor C1, Hall member
Part H1, Hall divider resistance R1, Hall divider resistance R4, zero mark resistance R2 adjusted, adjust zero mark resistance R3 and adjusts zero point electricity
R9, the adjusting zero mark resistance R3 and adjusting zero mark resistance R9 is hindered to be used to adjust zero point,
The power amplification circuit include operational amplifier IC1, input resistance R7, input resistance R8, profound and negative feedbck capacitor C3,
Profound and negative feedbck resistance R15, polarity protection elements D1, polarity protection elements D2, power amplifying device Q1, power amplifying device
Q2, resistance R16, resistance R17 and output signal sampling resistance R26, polarity protection elements D1 and polarity protection elements D2 are for preventing
Only circuit intermodulation distortion；The resistance R16 and resistance R17 is the resistance that ground level maintains electric current；
The inductor comparison circuit and including operational amplifier IC3, biasing resistor R22, input resistance R21 and feedback resistance
R35；The offset regulating circuit include operational amplifier IC4, adjustable biasing resistor R24, adjustable biasing resistor R25, can
Adjust biasing resistor R27, input resistance R23 and feedback resistance R36, the adjustable biasing resistor R24, adjustable biasing resistor
R25 and adjustable biasing resistor R27 is used to adjust the offset output value of operational amplifier, the principle of the second current sensor circuit
It is identical as the first current sensor circuit with structure；
Level V3 is identical as the value of level V1 value, level V5 ratio V1 high 0.2dB, the output of the second tunnel current sensor circuit electric current
Value and bias-adjusted are identical as the first current sensor circuit, and level V6 is identical as the numerical value of level V2；Level V4 compares level
The low 0.2dB of V2；
The first comparator circuit includes first comparator IC8, input resistance R40, input resistance R41, high value feedback electricity
Hinder R39, two pole voltage-stabiliser tube ZW1 of clamper and clamper two pole voltage-stabiliser tube ZW2, the first comparator IC8 comparative level V3 and level
V4；Second comparator circuit includes first comparator IC7, input resistance R43, input resistance R44, high value feedback resistance
R42, two pole voltage-stabiliser tube ZW3 of clamper and clamper two pole voltage-stabiliser tube ZW5, the second comparator IC7 comparative level V5 and level V6,
Wherein level V4 is lower than level V3, and level V7 is high level output, and level V6 is lower than level V5, and level V8 is high level output.
Preferably, the level V7 and level V8 of the level V7 output branch and level V8 output branch are high level
When, single-chip microcontroller analysis comparison result is normal, not to warning circuit transmission of control signals, the level V7 output branch and level V8
When the level V7 and level V8 for exporting branch are other above-mentioned situations, single-chip microcontroller analyzes comparison result exception, to warning circuit
Transmission of control signals, warning circuit execute actuation of an alarm.
The utility model has the advantages that compared with prior art, the invention has the following advantages that this circuit uses two-way current sensor work
Make, when normal work, every road undertakes the output of half, and low in energy consumption, the reliability of product increases；When two-way current sensor has one
When road is broken down, another way can continue to guarantee the normal operation of equipment；And once have sensor failure all the way, pass through
Single-chip microcontroller sounds an alarm, in time more emat sensor.
Detailed description of the invention
Fig. 1 is circuit structure diagram of the invention；
Fig. 2 is the functional schematic of the embodiment of the present invention.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
It the present invention rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention each
The modification of kind equivalent form falls within the application range as defined in the appended claims.
As shown in Figure 1, a kind of circuit of redundancy feature containing self-test, including sensor circuit, comparator circuit, single-chip microcontroller and
Warning circuit, sensor circuit are sequentially connected comparator circuit, single chip circuit and warning circuit；Sensor circuit includes first
The structure and principle of sensor circuit and second sensor circuit, first sensor circuit and second sensor circuit are all the same；
Comparator circuit includes first comparator circuit and the second comparator circuit, first comparator circuit and the second comparator circuit
Structure is all the same with principle；First sensor circuit includes V3 output branch and V5 output branch, and the level of V3 output branch is
The level that V3, V5 export branch is V5, and the second current sensor circuit includes V4 output branch and V6 output branch, V4 output branch
The level on road is V4, and the level that V6 exports branch is V6；V3 is exported branch and V5 output branch difference by first sensor circuit
It is connect with first comparator circuit and the second comparator circuit, V4 is exported branch and V6 output branch point by second sensor circuit
It is not connect with first comparator circuit and the second comparator circuit, first comparator circuit compares the value of V3 and V4 and to connect V7 defeated
Out branch, the level that V7 exports branch is V7, and the second comparator circuit compares the value of V5 and V6 and connects V8 output branch, and V8 is defeated
The level of out branch is V8；First comparator circuit and the input port connection different from single-chip microcontroller of the second comparator circuit, V7
The level V7 and level V8 of output branch and V8 output branch be when being high level, and it is normal that single-chip microcontroller analyzes comparison result, not to
Warning circuit transmission of control signals, it is other above-mentioned situations that V7, which exports branch and the level V7 and level V8 of V8 output branch,
When, single-chip microcontroller analyzes comparison result exception, and to warning circuit transmission of control signals, warning circuit executes actuation of an alarm.First passes
Compared with sensor circuit includes sensor sensing circuit, power amplification circuit, secondary coil, inductor with second sensor circuit
Circuit and offset regulating circuit, sensor sensing circuit are successively connect with power amplification circuit and secondary coil, in sensor sense
It answers and is also connected with capacitor and resistance composition profound and negative feedbck circuit between circuit and secondary coil, sensor sensing circuit is selected suddenly
You carry out electromagnetic induction by element, and power amplification circuit includes polarity protection elements and power amplifier, and polarity protection elements are used for
Circuit is protected, intermodulation distortion is prevented, power amplifier is used for the power amplification of circuit, sensor sensing electric current, power amplification
Circuit, secondary coil and profound and negative feedbck circuit constitute Hall closed-loop current sensors structure；Secondary coil connects induction simultaneously
Device comparison circuit and offset regulating circuit, inductor comparison circuit include operational amplifier, biasing resistor, input resistance and feedback
Resistance, offset regulating circuit include operational amplifier, adjustable biasing resistor, input resistance and feedback resistance, and biasing is adjusted
The offset output value of resistance adjustment operational amplifier；The secondary coil of first sensor circuit with connect inductor comparison circuit and
The level of offset regulating circuit connecting pin is V1, the secondary coil of second sensor circuit with connect inductor comparison circuit and inclined
The level of transposition section circuit connecting end is V2, and the level of the output end of the inductor comparison circuit of first sensor circuit is V3,
The level of the output end of offset regulating circuit is V5, and the level of the output end of the inductor comparison circuit of second sensor circuit is
V4, the level of the output end of offset regulating circuit are V6.Oscillating circuit and power supply source circuit, oscillating circuit are additionally provided on single-chip microcontroller
Oscillation frequency is provided for single-chip microcontroller, source circuit of powering provides stabilized power supply for single-chip microcontroller, and single-chip microcontroller selects the single-chip microcontroller of 80 series,
Power supply source circuit selects 1117-3.3V device to be powered；Warning circuit includes wireless WIFI chip and antenna, by wireless
WIFI chip and antenna are to master control room transmission alarm signal, to be supported in time.
As Fig. 1 circuit structure diagram in, each electronic component is analyzed as follows:
In first current sensor circuit: C1 is power supply filter capacitor, and H1 is Hall element, and R1 and R4 are Hall partial pressure electricity
Resistance, R2, R3 and R9 are to adjust zero mark resistance, for adjusting zero point, comparative level part in the first current sensor circuit:
IC1 is operational amplifier；R7, R8 are input resistances；C3, R15 are profound and negative feedbcks；Power in first current sensor circuit
Amplifier section: D1, D2 are polarity protections, prevent the generation of intermodulation distortion；Q1, Q2 are power amplifying devices；R16, R17 are ground levels
The resistance of electric current is maintained, L1 is secondary coil, and R26 is output signal sampling resistance.
The principle and structure of second current sensor circuit are identical as the first current sensor circuit.
In output valve and bias-adjusted functional module for the first current sensor circuit, including comparator circuit and partially
Transposition economize on electricity road, wherein in comparator circuit, IC3 is operational amplifier, and R22 is biasing resistor, and R21 is input resistance, and R35 is
Feedback resistance；In offset regulating circuit, IC4 is operational amplifier, and R24, R25, R27 are adjustable biasing resistors, adjusts fortune
The offset output value of amplifier is calculated, R23 is input resistance, and R36 is feedback resistance, and wherein V3 is identical as V1 value numerical value；The electricity of V5
It puts down than V1 high 0.2.The output valve and bias-adjusted of second tunnel current sensor circuit electric current and the first current sensor circuit
Identical wherein V6 is identical as V2 value numerical value；The low 0.2dB of level ratio V2 of V4.
It include that comparator circuit and single-chip microcontroller are divided into wherein in comparator circuit in the circuit of signal processing unit part
First comparator circuit and the second comparator circuit, for first comparator circuit, IC8 is to compare the first of V3 and V4 to compare
Device, R40, R41 are input resistances, and R39 is high value feedback resistance, and ZW1, ZW2 are two pole voltage-stabiliser tubes of clamper；Compare for second
Device circuit, IC7 are the second comparators for comparing V5 and V6, and R43, R44 are input resistances, and R42 is high value feedback resistance, ZW3,
ZW4 is two pole voltage-stabiliser tube of clamper.Wherein V4 is less than V3 level value, and V7 is high level output, and V6 is less than V5 level value, and V8 is high electricity
Flat output.
For the logic analysis in circuit diagram: as shown in Fig. 2, V1=V2, V3=V1, V6=V2, V5=V1+0.2dB, V4=V2-
0.2dB, therefore: V3=V4+0.2dB, V5=V6+0.2dB, V7 are high level, and V8 is high level.It is high level, V8 when meeting V7
When being high level, sensor is that normally, single-chip microcontroller will not control alarm unit alarm, but when for other situations, then demonstrate,prove
Bright sensor is in abnormality, and single-chip microcontroller controls timely more emat sensor after alarm unit alarm.
A kind of device using this circuit is described below, functional schematic is as shown in Fig. 2, a kind of redundancy feature containing self-test
Current sensor, including sensor group, signal processing unit and alarm unit,
Signal processing unit is connected with sensor group and alarm unit control respectively, when sensor group is powered, to signal processing list
Member one stringent low current signal with input signal linearly of output, signal processing unit from sensor group to inputting
Signal is handled, and whether the signal of signal processing unit analyte sensors group input is abnormal, when for abnormal results, at signal
It manages unit and sends signal to alarm unit, alarm unit executes respective action.
Wherein, sensor group includes the first current sensor circuit and the second current sensor circuit, the first current sense
Device circuit and the second current sensor circuit select Hall closed-loop current sensors, the first current sensor circuit and the second electricity
The structure of flow sensor circuit is identical, and independently works；First current sensor circuit includes V3 output branch and V5 defeated
Out branch, the level that V3 exports branch is V3, and the level that V5 exports branch is V5, and the second current sensor circuit includes V4 output
Branch and V6 export branch, and the level that V4 exports branch is V4, and the level that V6 exports branch is V6；Signal processing unit includes the
One comparator, the second comparator and single-chip microcontroller, V3 export branch and V4 output branch respectively with the input port of first comparator
Connection, provides the input signal of first comparator, and the output port connection V7 of first comparator exports branch, first comparator ratio
Compared with the level of V3 output branch and the level of V4 output branch and the signal that branch transmits is exported to single-chip microcontroller transmission V7；V5 output
Branch and V6 output branch are connect with the input port of the second comparator respectively, provide the input signal of the second comparator, and second
The output port connection V8 of comparator exports branch, and the second comparator compares the level of V5 output branch and the electricity of V6 output branch
Signal that is flat and being transmitted to single-chip microcontroller transmission V8 output branch；The letter of single-chip microcontroller analysis processing V7 output branch and V8 output branch
Number and whether carry out comparative analysis abnormal, decide whether to send control signal to alarm unit based on the analysis results, when for extremely
When as a result, signal processing unit sends signal to alarm unit, and alarm unit executes actuation of an alarm.Furthermore single-chip microcontroller also with 3.3V
Power supply source connection, 3.3V power supply source are used to provide power supply to single-chip microcontroller.Alarm unit includes wireless WIFI chip and antenna, is passed through
Wireless WIFI chip and antenna are to master control room transmission alarm signal, to be supported in time.
The Hall closed-loop current sensors that this circuit uses are also referred to as compensation sensor, i.e. major loop is tested electric current Ip poly-
Magnetic field caused by magnet ring passes through a secondary coil, and magnetic field caused by electric current compensates, to make at hall device
In the working condition of detection Zero flux.The specific work process of magnetic balancing current sensor are as follows: when major loop has an electric current logical
Out-of-date, the magnetic field generated on conducting wire is assembled and sensed on hall device by magnetism gathering rings, and generated signal output is for driving
It moves corresponding power tube and turns it on, to obtain a compensation electric current Is.This electric current passes through multicircuit winding again and generates magnetic
, the magnetic field and the magnetic field that tested electric current generates are exactly the opposite, thus compensate for original magnetic field, make the output of hall device
It is gradually reduced.When equal with magnetic field caused by the number of turns multiplication with Ip, Is is not further added by, and hall device at this moment plays instruction zero
The effect of magnetic flux can be balanced at this time by Is.Any variation of tested electric current can all destroy this balance.Once magnetic field
Disequilibrium, hall device just have signal output.After power amplification, just there is corresponding electric current to flow through secondary windings with right immediately
Unbalance magnetic field compensates.Unbalance to balancing again from magnetic field, less than 1 μ s on required time theory, this is a dynamic
The process of balance.
Of both the present invention solves the problems, such as: first is that sensor is remedied once damaging and do not influence the normal of equipment
Operation；Second is that notifying related personnel when sensor degradation, being replaced in time.
This circuit uses two-way testing principle, using Hall effect Closed loop operation principle, i.e., the output signal of sensor with
Input signal is at stringent corresponding relationship.In normal operation, for two-way all in working condition, output signal has two-way sensing
Device is shared jointly, and in the state that parameter designing is consistent, the output signal of each sensor is the half of total output signal.Once its
In be damaged all the way, another way will undertake full-scale output, and the magnetic field that magnetic field and the input signal of generation generate carries out flat
Weighing apparatus, thus, the normal acquisition electric current of sensor is not influenced, therefore nor affects on the normal operation of equipment.
The output signal of two alignment detection circuits is compared by the present invention, and under normal condition, two-way output signal is consistent
, it is damaged all the way once having, two-way output signal will occur inconsistent, after exporting by comparator, signal is sent into single-chip microcontroller,
And alarmed by way of wireless transmission, timely to be replaced, prevent unnecessary loss.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of circuit of redundancy feature containing self-test, it is characterised in that: including sensor circuit, comparator circuit, single-chip microcontroller and
Warning circuit, the sensor circuit are sequentially connected comparator circuit, single chip circuit and warning circuit；
The sensor circuit includes first sensor circuit and second sensor circuit, the first sensor circuit and second
The structure of sensor circuit and principle are all the same；
The comparator circuit includes first comparator circuit and the second comparator circuit, the first comparator circuit and second
The structure of comparator circuit and principle are all the same；
The first sensor circuit includes level V3 output branch and level V5 output branch, and level V3 exports the level of branch
It is level V5 for level V3, level the V5 level for exporting branch, second current sensor circuit includes level V4 output branch
Road and level V6 export branch, and the level that level V4 exports branch is level V4, and the level that level V6 exports branch is level V6；
Level V3 is exported branch and level V5 output branch respectively compared with first comparator circuit and second by first sensor circuit
Device circuit connection, second sensor circuit by level V4 export branch and level V6 output branch respectively with first comparator circuit
It is connected with the second comparator circuit, the value of the first comparator circuit comparative level V3 and level V4 simultaneously connect level V7 output
Branch, the level that V7 exports branch is level V7, value and the connection of the second comparator circuit comparative level V5 and level V6
Level V8 exports branch, and the level that level V8 exports branch is level V8；
The first comparator circuit and the input port connection different from single-chip microcontroller of the second comparator circuit, single-chip microcontroller are more electric
The value of flat V7 and level V8 simultaneously analyse whether exception, and when for abnormal results, single-chip microcontroller gives warning circuit transmission of control signals, report
Alert circuit executes actuation of an alarm.
2. circuit according to claim 1, it is characterised in that: the first sensor circuit and second sensor circuit are equal
Including sensor sensing circuit, power amplification circuit, secondary coil, inductor comparison circuit and offset regulating circuit, the biography
Sensor sensor circuit is successively connect with power amplification circuit and secondary coil, between sensor sensing circuit and secondary coil also
It connects capacitor and resistance forms profound and negative feedbck circuit,
The sensor sensing circuit selects Hall element to carry out electromagnetic induction；The secondary coil connects inductor simultaneously and compares
Circuit and offset regulating circuit；
The secondary coil of the first sensor circuit and the electricity for connecting inductor comparison circuit and offset regulating circuit connecting pin
Put down as level V1, the secondary coil of the second sensor circuit with connect inductor comparison circuit and offset regulating circuit connects
The level at end is level V2,
The level of the output end of the inductor comparison circuit of the first sensor circuit is level V3, the offset regulating circuit
The level of output end be level V5, the level of the output end of the inductor comparison circuit of the second sensor circuit is level
V4, the level of the output end of the offset regulating circuit are level V6.
3. circuit according to claim 1, it is characterised in that: be additionally provided with oscillating circuit and power supply source electricity on the single-chip microcontroller
Road, the oscillating circuit provide oscillation frequency for single-chip microcontroller, and the power supply source circuit provides stabilized power supply, the list for single-chip microcontroller
Piece machine selects the single-chip microcontroller of 80 series, and the power supply source circuit selects 1117-3.3V device to be powered.
4. circuit according to claim 1, it is characterised in that: the warning circuit includes wireless WIFI chip and antenna,
Alarm signal is transmitted to master control room by wireless WIFI chip and antenna, to be supported in time.
5. circuit according to claims 1 and 2, it is characterised in that: the first sensor circuit includes sensor sensing
Circuit, power amplification circuit, secondary coil L1, inductor comparison circuit and offset regulating circuit, the sensor sensing circuit
Including power supply filter capacitor C1, Hall element H1, Hall divider resistance R1, Hall divider resistance R4, adjust zero mark resistance R2,
It adjusts zero mark resistance R3 and adjusts zero mark resistance R9, the adjusting zero mark resistance R3 and adjusting zero mark resistance R9 are for adjusting zero
Point,
The power amplification circuit include operational amplifier IC1, input resistance R7, input resistance R8, profound and negative feedbck capacitor C3,
Profound and negative feedbck resistance R15, polarity protection elements D1, polarity protection elements D2, power amplifying device Q1, power amplifying device
Q2, resistance R16, resistance R17 and output signal sampling resistance R26, polarity protection elements D1 and polarity protection elements D2 are for preventing
Only circuit intermodulation distortion；The resistance R16 and resistance R17 is the resistance that ground level maintains electric current；
The inductor comparison circuit and including operational amplifier IC3, biasing resistor R22, input resistance R21 and feedback resistance
R35；The offset regulating circuit include operational amplifier IC4, adjustable biasing resistor R24, adjustable biasing resistor R25, can
Adjust biasing resistor R27, input resistance R23 and feedback resistance R36, the adjustable biasing resistor R24, adjustable biasing resistor
R25 and adjustable biasing resistor R27 is used to adjust the offset output value of operational amplifier, the principle of the second current sensor circuit
It is identical as the first current sensor circuit with structure；
Level V3 is identical as the value of level V1 value, level V5 ratio V1 high 0.2dB, the output of the second tunnel current sensor circuit electric current
Value and bias-adjusted are identical as the first current sensor circuit, and level V6 is identical as the numerical value of level V2；Level V4 compares level
The low 0.2dB of V2；
The first comparator circuit includes first comparator IC8, input resistance R40, input resistance R41, high value feedback electricity
Hinder R39, two pole voltage-stabiliser tube ZW1 of clamper and clamper two pole voltage-stabiliser tube ZW2, the first comparator IC8 comparative level V3 and level
V4；Second comparator circuit includes first comparator IC7, input resistance R43, input resistance R44, high value feedback resistance
R42, two pole voltage-stabiliser tube ZW3 of clamper and clamper two pole voltage-stabiliser tube ZW5, the second comparator IC7 comparative level V5 and level V6,
Wherein level V4 is lower than level V3, and level V7 is high level output, and level V6 is lower than level V5, and level V8 is high level output.
6. circuit according to claim 1, it is characterised in that: the level V7 output branch and level V8 export branch
When level V7 and level V8 are high level, single-chip microcontroller analysis comparison result is normal, not to warning circuit transmission of control signals, institute
State level V7 output branch and level V8 output branch level V7 and level V8 be other above-mentioned situations when, single-chip microcontroller analysis
Comparison result is abnormal, and to warning circuit transmission of control signals, warning circuit executes actuation of an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811151075.4A CN109283382A (en) | 2018-09-29 | 2018-09-29 | A kind of circuit of the redundancy feature containing self-test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811151075.4A CN109283382A (en) | 2018-09-29 | 2018-09-29 | A kind of circuit of the redundancy feature containing self-test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109283382A true CN109283382A (en) | 2019-01-29 |
Family
ID=65182350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811151075.4A Pending CN109283382A (en) | 2018-09-29 | 2018-09-29 | A kind of circuit of the redundancy feature containing self-test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109283382A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881544A (en) * | 2015-05-29 | 2015-09-02 | 西北工业大学 | Multi-data triple modular redundancy judgment module based on FPGA (Field Programmable Gate Array) |
| CN205719048U (en) * | 2016-05-31 | 2016-11-23 | 安徽江淮汽车股份有限公司 | A kind of accelerator pedal sensor signal checking circuit |
-
2018
- 2018-09-29 CN CN201811151075.4A patent/CN109283382A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881544A (en) * | 2015-05-29 | 2015-09-02 | 西北工业大学 | Multi-data triple modular redundancy judgment module based on FPGA (Field Programmable Gate Array) |
| CN205719048U (en) * | 2016-05-31 | 2016-11-23 | 安徽江淮汽车股份有限公司 | A kind of accelerator pedal sensor signal checking circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205067643U (en) | Direct current system's of transformer substation distributed insulation monitoring and warning device | |
| CN202583315U (en) | On-line monitoring system for transformer iron core grounding current | |
| CN103244447A (en) | Fault detection circuit and method for accurately detecting running conditions of alternating current fan | |
| CN104678264A (en) | Online insulation detection and fault processing device and method of AUV (Autonomous Underwater Vehicle) direct-current power supply system | |
| CN204439709U (en) | A kind of information collecting device of electricity load management terminal | |
| CN111965498B (en) | Automatic inspection and fault positioning device for insulation state of hydraulic generator screw | |
| CN105355069A (en) | Signal lamp fault detection circuit with function of voltage and current detection, and detection control method therefor | |
| CN112731255A (en) | System and method for detecting damping loop of capacitive voltage transformer | |
| CN109239437A (en) | A kind of current sensor of the redundancy feature containing self-test | |
| CN109283382A (en) | A kind of circuit of the redundancy feature containing self-test | |
| CN117154649A (en) | Power supply line control method and system | |
| CN103116122B (en) | A kind of power cell testing circuit, series circuit and bypass detecting system | |
| CN205247633U (en) | Signal lamp failure detector circuit with voltage current detection function | |
| CN210072858U (en) | Intelligence street lamp cable theftproof monitor terminal | |
| CN212301814U (en) | Multifunctional direct-current insulation online monitoring device | |
| CN205015427U (en) | Neutral point multipoint earthing detection device based on high accuracy testing electric current | |
| CN212845894U (en) | Real-time monitoring circuit for line condition of user electric meter | |
| CN107957568A (en) | Secondary Circuit of Potential Transformer multipoint earthing Quick positioning instrument and lookup method | |
| CN216956318U (en) | Voltage transformer monitoring device | |
| CN212845893U (en) | Short-circuit fault warning device for RS485 branch line of electric meter | |
| CN105929219B (en) | A kind of improved full loop electroscope and its control method | |
| CN209764993U (en) | Integrated iron core grounding current online monitoring device | |
| CN220271538U (en) | Current transformer access detection system | |
| CN102360049B (en) | Virtual zero point detector for magnetic modulators | |
| CN219105020U (en) | Current detection equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190129 |
|
| RJ01 | Rejection of invention patent application after publication |